Cylinder head with liquid-type cooling

Abstract

A cylinder head with liquid cooling, and which has an intake port which opens into a combustion chamber, an exhaust port per cylinder, a fuel injection device which opens into the combustion chamber and which adjoins the intake port and the exhaust port, and at least one cooling chamber which is arranged in the cylinder head. A cooling distribution duct, which is drilled or pre-cast, is arranged in a region of the fire deck, and extends substantially parallel to the fire deck and opens into an annular chamber surrounding the fuel injection device. The annular chamber has at least one substantially radial first cooling bore which is directed towards a valve web region formed between the intake port and the exhaust port and which adjoins the fire deck.

What is claimed is: 
     
       1. A cylinder head, comprising:
 an intake port which opens into a combustion chamber; 
 an exhaust port per cylinder; 
 a fuel injection device which opens into the combustion chamber; 
 a valve web region formed between the intake port and the exhaust port; 
 a casting slug having a bore which receives the fuel injection device; 
 a receiving sleeve received by the bore of the casting slug; 
 an annular chamber in the bore to concentrically surround the fuel injection device and defined by the casting slug and the receiving sleeve; 
 a fire deck; 
 at least one cooling chamber having a cooling distribution duct through which a coolant flows, and which is arranged in a region of, and extends substantially parallel to, a fire deck, and which opens into the annular chamber; 
 at least one first cooling bore extending from the annular chamber to cool the valve web region, and which adjoins the fire deck; and 
 at least one second cooling bore extending from the annular chamber, and which is directed approximately tangentially to an outside surface of the exhaust port facing the at least one cooling chamber. 
 
     
     
       2. The cylinder head of  claim 1 , wherein the valve web region is arranged downstream of the annular chamber relative to a direction of flow of the coolant. 
     
     
       3. The cylinder head of  claim 1 , wherein the cooling distribution duct has a flow cross-section which is greater than a flow cross-section of the at least one first cooling bore. 
     
     
       4. The cylinder head of  claim 1 , wherein the cooling distribution duct has a flow cross-section which is at least twice as great as a flow cross-section of the at least one first cooling bore. 
     
     
       5. The cylinder head of  claim 1 , wherein the axis of the at least one first cooling bore and the axis of the cooling distribution duct are aligned in parallel. 
     
     
       6. The cylinder head of  claim 1 , wherein the axis of the at least one first cooling bore and the axis of the cooling distribution duct are coaxial. 
     
     
       7. The cylinder head of  claim 1 , further comprising:
 a cylinder head sealing plane; and 
 at least one supply bore originating from the cylinder head sealing plane and which opens into the cooling distribution duct. 
 
     
     
       8. The cylinder head of  claim 1 , wherein the at least one second cooling bore is arranged in a region of the fire deck. 
     
     
       9. The cylinder head of  claim 1 , wherein the at least one second cooling bore is arranged in a region of an interface between the cooling distribution duct and the annular chamber. 
     
     
       10. The cylinder head of  claim 1 , wherein the cooling distribution duct is drilled into the cylinder head. 
     
     
       11. The cylinder head of  claim 1 , wherein the cooling distribution duct is pre-cast with the cylinder head. 
     
     
       12. A cylinder head, comprising:
 an intake port which opens into a combustion chamber; 
 an exhaust port per cylinder; 
 a fuel injection device which opens into the combustion chamber; 
 a valve web region formed between the intake port and the exhaust port; 
 an annular chamber concentrically surrounding the fuel injection device and defined by a casting slug and a receiving sleeve, the casting slug having a bore which receives the receiving sleeve and the fuel injection device; 
 a fire deck; 
 at least one cooling chamber having a cooling distribution duct which opens into the annular chamber; 
 at least one first cooling bore extending from the annular chamber to cool the valve web region, and which adjoins the fire deck; and 
 at least one second cooling bore extending from the annular chamber, and which is directed approximately tangentially to an outside surface of the exhaust port facing the at least one cooling chamber. 
 
     
     
       13. The cylinder head of  claim 12 , wherein the at least one third cooling bore is spaced from the at least one second cooling bore relative to a direction of the cylinder axis. 
     
     
       14. The cylinder head of  claim 12 , wherein the cooling distribution duct has a flow cross-section which is greater than a flow cross-section of the at least one first cooling bore. 
     
     
       15. The cylinder head of  claim 12 , wherein the cooling distribution duct has a flow cross-section which is at least twice as great as a flow cross-section of the at least one first cooling bore. 
     
     
       16. The cylinder head of  claim 12 , wherein the axis of the at least one first cooling bore and the axis of the cooling distribution duct are aligned in parallel. 
     
     
       17. The cylinder head of  claim 12 , wherein the axis of the at least one first cooling bore and the axis of the cooling distribution duct are coaxial. 
     
     
       18. The cylinder head of  claim 12 , further comprising:
 a cylinder head sealing plane; and 
 at least one supply bore originating from the cylinder head sealing plane and which opens into the cooling distribution duct. 
 
     
     
       19. The cylinder head of  claim 12 , wherein the at least one second cooling bore is arranged in a region of an interface between the cooling distribution duct and the annular chamber. 
     
     
       20. A cylinder head, comprising:
 an intake port which opens into a combustion chamber; 
 an exhaust port per cylinder; 
 a fuel injection device which opens into the combustion chamber; 
 an annular chamber concentrically surrounding the fuel injection device and defined by a casting slug and a receiving sleeve, the casting slug having a bore which receives the receiving sleeve and the fuel injection device; 
 at least one cooling chamber having a cooling distribution duct through which a coolant flows, and which opens into the annular chamber; 
 a plurality of cooling bores extending from the annular chamber, at least one of said cooling bores being directed approximately tangentially to an outside surface of the exhaust port facing the at least one cooling chamber, 
 wherein the cooling distribution duct has a flow cross-section which is greater than a flow cross-section of the plurality of cooling bores.